EP1101019A1 - Procede et dispositif de retraitement des gaz d'echappement d'un moteur a combustion interne - Google Patents

Procede et dispositif de retraitement des gaz d'echappement d'un moteur a combustion interne

Info

Publication number
EP1101019A1
EP1101019A1 EP99931084A EP99931084A EP1101019A1 EP 1101019 A1 EP1101019 A1 EP 1101019A1 EP 99931084 A EP99931084 A EP 99931084A EP 99931084 A EP99931084 A EP 99931084A EP 1101019 A1 EP1101019 A1 EP 1101019A1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
face
area
filter
rotation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP99931084A
Other languages
German (de)
English (en)
Inventor
Axel König
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volkswagen AG
Original Assignee
Volkswagen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19850762A external-priority patent/DE19850762A1/de
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of EP1101019A1 publication Critical patent/EP1101019A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/9454—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • B01D53/885—Devices in general for catalytic purification of waste gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/0214—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters with filters comprising movable parts, e.g. rotating filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
    • F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2290/00—Movable parts or members in exhaust systems for other than for control purposes
    • F01N2290/02—Movable parts or members in exhaust systems for other than for control purposes with continuous rotary movement
    • F01N2290/06—Movable parts or members in exhaust systems for other than for control purposes with continuous rotary movement driven by auxiliary drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/04—Sulfur or sulfur oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/12—Other methods of operation
    • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a device and a method for the aftertreatment of the engine exhaust gases of an internal combustion engine, and in particular relates to a device and a method for the aftertreatment of soot particles and / or nitrogen oxides in the exhaust gas stream.
  • Known NOx catalysts absorb the nitrogen oxides generated during the lean operation of an engine and reduce the stored NOx during rich operation of the engine, the known processes being discontinuous and the storage and reduction of the nitrogen oxides taking place in different phases.
  • the memory In order to be able to carry out such a method, the memory must be emptied after a certain time due to its finite absorption capacity. This either happens after a fixed predetermined time or the degree of filling of the catalyst must be determined. If the memory is regenerated after a predefined time has elapsed, this has the disadvantage that the storage capacity of the catalytic converter is not fully utilized for safety reasons, so that optimum engine operation with regard to consumption and exhaust gas behavior is not possible.
  • a minimum temperature of approximately 250 ° C. is required for a NOx storage catalytic converter to function adequately. If the exhaust gas coming from the engine is too cold, the process can only work if the catalytic converter is on it Minimum temperature is heated. This causes heat losses, which greatly increases the energy requirement.
  • soot particles occur in the exhaust gas of diesel engines that cannot be released into the environment.
  • the soot particles are retained in a known device and are cyclically replaced when the soot filter reaches a certain filling level, or the retained soot particles are ignited and burned with an appropriate heating device. Both approaches are unsatisfactory for continuous use.
  • the invention is therefore based on the object of developing a device and a method for treating the exhaust gas flow of an internal combustion engine, which enable optimal engine operation.
  • the device according to the invention for the aftertreatment of the engine exhaust gases of an internal combustion engine has a body or monolith with channels through which the exhaust gas flows and which is rotatably arranged in the exhaust gas flow.
  • Monolith is understood here to mean a body which can be made in one piece from ceramic, from metallic carrier materials or from ceramic or metallic segments which are arranged in a receiving structure.
  • the device has an inflow channel which is in flow connection with a part (B1) of the channels of the body. Furthermore, a flow connection is provided, which is connected on the output side to the part B1 of the ducts flowed against by the inflow duct and connects this in terms of flow to a part B2 of the ducts which is not in flow connection to the inflow duct.
  • the body or monolith is preferably divided into two areas B1, B2, the exhaust gas entering the first area B1 on the front face of the body, exiting on the rear face of the first area B1, passing through the filter attached there, into one End face of the second area B2 enters and leaves the second area B2 on the other end face 2, the body 4 during the Flow around an axis essentially perpendicular to the flow direction of the exhaust gas stream.
  • the body preferably has a cylindrical shape, the channels extending in the radial direction.
  • the body has a cylindrical recess in the axial direction, in other words the cylinder is hollow in the axial direction.
  • the body can consist of metal or ceramic, whereby it can be formed in one piece or assembled from segments. If the body consists of segments, these are traversed by channels so that the channels extend in radial direction with respect to the axis of symmetry of the cylinder after the segments have been assembled.
  • the device comprises a filter which can be rotatably arranged, the filter in particular being able to rotate with the monolith, in the case of the cylindrical body with the axial cavity the filter being arranged therein.
  • the filter can be stationary or rotate with the body, the speed of rotation not having to be identical to the speed of rotation of the body.
  • the internal combustion engine has a direct fuel injection into the combustion chamber and / or is a diesel fuel engine.
  • the filter preferably has a heating element which serves to bring the filter to operating temperature after a cold start. After reaching the required temperature, the heating element can be switched off. In principle, additional heating is only provided if the engine conditions (exhaust gas temperature) do not lead to soot burn-off.
  • the temperature required for the conversion of pollutants can alternatively or in a supportive manner also be quickly achieved by suitably selected engine parameters (injection quantity, injection course, post-injection); here, too, the engine parameters are returned to their normal conditions when the desired temperature has been reached.
  • the body can be at least partially catalytically coated to reduce pollutants, in particular to reduce NOx, HC and / or CO.
  • the device also has a fixed housing (12) in which the body rotating about its longitudinal axis is arranged.
  • the housing is preferably made of a non-metallic material.
  • the body is preferably rotated by a drive unit.
  • the drive unit can be formed by an electric motor. It is also possible for the drive unit to be formed by an external magnetic field and magnets arranged inside the housing. Furthermore, the body can also be rotated through the exhaust gas flow in the manner of a turbine.
  • the speed of rotation of the body (4) is preferably approximately 0.3 to 10 rpm, the speed of rotation being selected so that the maximum of the temperature distribution which arises remains inside the body, preferably at the location of the filter.
  • the device can have a means for introducing additional fuel in order to bring about a reduction in the NOx exhaust gas component when the engine can be operated lean.
  • the means for introducing additional fuel is preferably arranged in the axis of rotation of the body.
  • the method according to the invention for the aftertreatment of the exhaust gas of an internal combustion engine, a body being arranged in the exhaust gas flow and having channels in the exhaust gas flow direction and being divided into two areas, has the following steps:
  • the body is rotated about its axis at such a speed that heating of the second region by the exhaust gas flow leads to heating of the exhaust gas flow by the first region.
  • a retention of the soot particles of the exhaust gas flow is preferably effected on a filter which is arranged between the exhaust gas outlet side face of the first region and the exhaust gas inlet side end face of the second region, and the speed of rotation is selected such that the maximum of the temperature front approximately approaches the filter located.
  • the body used in the method is preferably at least partially catalytically coated, so that NOx storage of the exhaust gas is effected during the lean phases of the internal combustion engine.
  • a continuous NOx storage regeneration process can be brought about by adding reducing agents to the body.
  • the method according to the invention for desulfating the device according to the invention for aftertreatment of the exhaust gases of an internal combustion engine, the device being designed as a NOx storage device, has the following steps:
  • FIG. 1a shows a horizontal cross-sectional view through a first embodiment of the device according to the invention for the aftertreatment of the exhaust gas of an internal combustion engine
  • Fig. 1b shows a vertical cross section through the device of Fig. 1a
  • FIG. 2 shows a horizontal cross-sectional view through a second embodiment of the device according to the invention for the aftertreatment of the exhaust gas of an internal combustion engine
  • FIG. 1a shows a horizontal cross section through a first preferred embodiment of a device according to the invention for the aftertreatment of the exhaust gas of an internal combustion engine.
  • Raw exhaust gas from an engine flows through an exhaust gas supply 1 into an outer end face 2, a first region B1 of a cylindrical body 4, which is traversed by channels 3.
  • the channels 3 run in the radial direction with respect to the axis of rotation 9 formed by the axis of symmetry of the cylinder.
  • the channels 3 arranged perpendicular to the axis of rotation 9 are at least partially catalytically coated, as has already been mentioned above.
  • the exhaust gas After the exhaust gas emerges from the inner end face 5 of the body 4, which is formed by an axial cavity 7 formed centrally in the body, the exhaust gas passes through a particle filter 6 arranged in the cavity 7 and passes through the outer end face 5 into an opposite second one Area B2 and enters an outflow channel 8 on the outer end face 2 of the second area B2.
  • 1 a shows that the first area and the second area are limited to three channels 3 by the inflow channel 1 and the outflow channel 8. This is not absolutely necessary.
  • Another construction of the housing 10 enclosing the body 4 can ensure that the inflowing and outflowing exhaust gas each reach a first and second region B1, B2 of a maximum of 180 °. In other words, the first and the second region can comprise at most half of the body 4.
  • FIG. 1b shows a vertical section through the device according to the invention.
  • the filter 6, which generally rotates synchronously with the body 4, is arranged in the interior of the body 4 through which the channels 3 pass.
  • the body 4 and the filter 6 are arranged in a corresponding housing 10. The rotation takes place about an axis of rotation 9, which can serve as the supply of additional fuel for combustion in a catalytically active filter or in the rotor matrix, ie the body 4.
  • the filter 6 flowing through the body 4 the temperature rises on the inlet side due to the catalytic conversion of CO and HC present in the exhaust gas during the passage through the catalytically coated channels 3.
  • nitrogen oxides can be chemically absorbed if the channels 3 are coated with a NOx-absorbing catalyst.
  • the temperature maximum is reached in the middle of the device, in the particle filter 6.
  • the exhaust gas releases its heat again and leaves the rotor 4 at approximately the same temperature as on the inlet side. Without rotation, the temperature front, i.e. the maximum temperature driven out of the device.
  • the temperature font is driven back into the system again and again.
  • a periodically stationary profile is created, the maximum of which lies in the area of the filter 6.
  • FIG. 2 shows a horizontal cross-sectional view through a second embodiment of the device according to the invention for the aftertreatment of the exhaust gas of an internal combustion engine, in which the device is operated as a pure NOx storage catalytic converter.
  • Fig. 2 shows a body 4 rotating about its longitudinal axis, which is coated as a NOx storage catalytic converter, which is used as a regenerative heat exchanger.
  • the body 4 has a large number of fine channels 3 in the radial direction and the exhaust gas flows radially through it, namely the exhaust gas is supplied to it via an inflow channel 1 and is discharged via an outflow channel 8, as a result of which first and second regions B1, B2, as in the case of the first Embodiment are formed.
  • the body has an axial cavity 7 which is delimited by the inner end face 5 of the body 4. The axial cavity serves for the fluidic connection of the channels 3 of the first and the second region B1, B2.
  • the inner part, represented as a circular ring T1 of the channels 3 is equipped with a NOx-storing Coated catalyst.
  • the outer part of the channels, represented by a circular ring T2 is not coated and does not participate in the catalysis, it only functions as a heat exchanger. Due to the radial flow with simultaneous rotation, a temperature profile can be set in the body 4, which is located on the inlet and outlet sides of the outer end face 2 of the body approximately at the exhaust gas temperature and rises steeply towards approximately 350 to 400 ° C. towards the center . This means that part of the catalytic converter is always in an optimal temperature range for NOx storage.
  • the rotating arrangement of the catalyst ie the body 4, ensures the best possible heat recovery according to the regenerator principle. With ideal thermal insulation and correct dimensioning and rotation speed, the heat once entered will no longer leave the system. The heat losses actually occurring are compensated for by the heat of reaction which is released in the T1 area during the pollutant oxidation.
  • the ignition temperature of approx. 200 ° C must be reached in the catalytically active area T2.
  • an electrical heating element 11 can be provided in the middle of the body 4.
  • the temperature required for the conversion of pollutants can also be achieved by suitably selected engine parameters (in particular in the case of common rail injection, for example by varying the injection timing, the injection process, the injection quantity, and / or post-injection).
  • the measures are ended after the ignition temperature has been reached.
  • the further temperature increase only takes place by a brief increase in the pollutant concentrations, which raises the catalyst temperature through the heat of reaction released in the area T1 during the conversion of the pollutants. This increase in the pollutant concentration can either be done by a separate fuel metering in the middle of the body 4, or can also be brought about by motor parameters.
  • the rotation of the body 4 is realized by a suitable electrical or mechanical drive (not shown).
  • the body 4 is mounted on a rotatably mounted shaft or axis of rotation 9, which is set in rotation by the above-mentioned drive.
  • the additional fuel can also be introduced through this shaft 9.
  • the speed of rotation can be determined with the help of suitable information Engine control unit to be adapted to the operating state of the vehicle engine.
  • the body 4 is arranged in a suitable fixed housing 10.
  • the regeneration of the NOx storage catalytic converter takes place in the known manner by engine enrichment of the exhaust gas.
  • the catalyst must be desulfated from time to time, as has already been described above. This is done thermally at temperatures above 600 ° C. As already mentioned above, in the system described an almost arbitrary temperature increase can be achieved by increasing the pollutant concentration or its oxidation. By appropriately controlling the speed of rotation and the concentration of pollutants, the catalyst can be kept at the required high temperatures for the required time of several minutes. As already described above, the energy consumption is significantly lower compared to conventional systems.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

L'invention concerne un procédé et un dispositif de retraitement des gaz d'échappement d'un moteur à combustion interne. Ledit dispositif présente un corps (4) parcouru par les gaz d'échappement et placé de manière rotative dans le flux de gaz d'échappement, ainsi qu'un filtre (6) pouvant tourner avec ledit corps (4). La vitesse de rotation de ce corps (4) est sélectionnée de sorte que la plus grande partie du front de température se formant dans le corps demeure dans ce dernier. De préférence, ce corps se présente sous la forme d'un cylindre comportant une cavité axiale (7) pour le logement du filtre (6), ladite cavité étant traversée par des canaux (3) dans le sens radial (3). L'axe de rotation de ce cylindre est perpendiculaire au sens d'écoulement des gaz d'échappement. Si ce corps se présente sous la forme d'un catalyseur accumulateur de NOx, l'élimination du monoxyde d'azote peut être provoquée par enrichissement cyclique des gaz d'échappement ou par introduction de carburant supplémentaire dans ledit dispositif. Une désulfatation du catalyseur est ainsi provoquée par une commande correspondante de la rotation du catalyseur.
EP99931084A 1998-07-31 1999-06-17 Procede et dispositif de retraitement des gaz d'echappement d'un moteur a combustion interne Ceased EP1101019A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19834576 1998-07-31
DE19834576 1998-07-31
DE19850762A DE19850762A1 (de) 1998-07-31 1998-11-04 Vorrichtung und Verfahren zur Nachbehandlung der Motorabgase einer Brennkraftmaschine
DE19850762 1998-11-04
PCT/EP1999/004187 WO2000008310A1 (fr) 1998-07-31 1999-06-17 Procede et dispositif de retraitement des gaz d'echappement d'un moteur a combustion interne

Publications (1)

Publication Number Publication Date
EP1101019A1 true EP1101019A1 (fr) 2001-05-23

Family

ID=26047825

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99931084A Ceased EP1101019A1 (fr) 1998-07-31 1999-06-17 Procede et dispositif de retraitement des gaz d'echappement d'un moteur a combustion interne

Country Status (5)

Country Link
US (1) US20010004831A1 (fr)
EP (1) EP1101019A1 (fr)
JP (1) JP2002522684A (fr)
CN (1) CN1311844A (fr)
WO (1) WO2000008310A1 (fr)

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US5974790A (en) 1998-03-05 1999-11-02 Ford Global Technologies, Inc. Catalytic converter decontamination method
JP4304447B2 (ja) * 2003-08-29 2009-07-29 いすゞ自動車株式会社 排気ガス浄化方法及び排気ガス浄化システム
JP4265497B2 (ja) * 2004-07-05 2009-05-20 トヨタ自動車株式会社 排気浄化装置の制御方法
GB2436077A (en) * 2006-03-18 2007-09-19 Ford Global Tech Llc An emission control device for an engine
US9976501B2 (en) * 2015-10-26 2018-05-22 Ford Global Technologies, Llc Methods and systems for rotating an exhaust aftertreatment device
CN105649728B (zh) * 2016-01-06 2017-12-01 嵊州北航投星空众创科技有限公司 耐用型三元催化器
US10208642B2 (en) * 2016-04-28 2019-02-19 Ford Global Technologies, Llc Systems and methods for a soot sensor
CN107694287A (zh) * 2017-11-20 2018-02-16 湖州市练市聚丰线缆厂 一种漆包线废气过滤装置

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US20010004831A1 (en) 2001-06-28
WO2000008310A1 (fr) 2000-02-17
CN1311844A (zh) 2001-09-05
JP2002522684A (ja) 2002-07-23

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